Easy to install and it worked flawlessly!
Information
Product reviews
Specs of The AR-TT
AS Designs · ARMP5v3 Rev. 2 · ARC-Fire V2 · Ambi · Complete Kit · 6 Host Gun Variants
The AS Designs MP5 ARC-Fire Lower is the premium active reset lower for the MP5 platform — built on the same ARMP5v3 Rev. 2 billet 7075-T6 aluminum lower as the Super Safety version, paired with AS Designs' own ARC-Fire V2 ambidextrous active reset system. The ARC-Fire V2 is AS Designs' flagship trigger system, and this complete kit delivers everything needed to run it in your MP5 host gun without permanent modification.
Available for six host gun configurations. Select your variant from the dropdown before adding to cart.
Want the Super Safety Instead?
If you prefer the Hoffman Tactical Super Safety over the ARC-Fire V2, see the AS Designs MP5 Super Safety Lower Complete Kit ($649.99) — same premium lower, Super Safety internals at $100 less.
ARC-Fire V2 vs Super Safety — Which Is Right for You
- ARC-Fire V2 ($749.99) — AS Designs' own flagship system. Ambidextrous out of the box, configurable selector positions (0-90-180, 0-45-90, or 0-45-180). The most refined active reset system AS Designs produces. Choose this if you want the best AS Designs has built
- Super Safety ($649.99) — Hoffman Tactical's proven 3-position system. Slightly lower price point, battle-tested across thousands of AR-15 builds, now adapted for the MP5 platform. Choose this if you are already familiar with the Super Safety system
What's In The Complete Kit
ARMP5v3 Lower — Rev. 2
CNC billet 7075-T6 aluminum, Type III hardcoat anodized black. Updated ejector lever mount. Laser engraved SAFE - SEMI - ARC markings.
ARC-Fire V2 — Ambi
AS Designs ARC-Fire V2 ambidextrous kit. Standard config: 0-90-180. Contact us before ordering for alternate configs.
MP5 Hammer
AS Designs custom MP5 hammer — designed specifically for this lower and the ARC-Fire active reset system.
Mil-Spec FCG
Disconnector and springs — complete fire control group components included.
Anti-Walk Pins
Required for this lower. Anti-walk pins (not anti-rotation) included in every kit.
Slip Trip V5
7075-T6 aluminum Slip Trip V5 — the interface between the AR-style lower and your MP5 upper. Installs into the upper.
Custom Ejector Lever
4140 steel, heat treated, oxide coated. Includes ejector lever nut, bushing, and 2x 3mm screws.
AR Grip
Mil-spec AR grip included. Contact us before ordering if you want a specific grip upgrade.
How ARC-Fire V2 Works in an MP5
Safe
Trigger blocked. No fire. Standard safe position.
Semi
Standard semi-auto fire. Trigger fires and resets manually as normal.
ARC (Active Reset)
As the bolt carrier cycles, the ARC-Fire mechanism forces the trigger forward before the bolt returns to battery — enabling the fastest follow-up fire your trigger finger can produce. One round per trigger function.
Lower Construction
- 7075-T6 billet aluminum — the highest-strength aluminum alloy used in firearm construction, CNC machined to tight tolerances
- Type III hardcoat anodized — mil-spec surface treatment for maximum hardness and corrosion resistance
- Rev. 2 ejector lever mount — updated design with 4140 steel heat-treated ejector lever, custom bushing, and nut for reliable case ejection
- Laser engraved markings — SAFE - SEMI - ARC positions clearly marked on the lower
- AR-15 FCG compatible — accepts standard AR-15 fire control group components and premium aftermarket triggers including Geissele
- Ambidextrous ARC-Fire V2 — left and right hand operation with configurable selector travel positions
Host Gun Compatibility — Select Your Variant
| Variant | Compatible Host Guns | Size |
|---|---|---|
| AP5 / ZF5 / MAC-5 / POF-5 | Century Arms AP5, AP5-SD · Zenith ZF5, ZF5RS · MAC-5 · POF-5, POF-5PK | Full Size |
| AP5-P / ZF5-K / MAC-5K | Century Arms AP5-P · Zenith ZF5-K · MAC-5K | MP5-K |
| H&K SP5 / SP5-L | Heckler & Koch SP5 · SP5-L | Full Size |
| H&K SP5K / SP5K-PDW | Heckler & Koch SP5K · SP5K-PDW | MP5-K |
| PTR 9C / 9CT / 9RS | PTR 9C · PTR 9CT · PTR 9RS | Full Size |
| PTR 9KT | PTR 9KT | MP5-K |
Important Compatibility Notes
Does not fit PTR or H&K models not listed above. If your host gun is not in the table, do not order. Some hand fitment may be required due to tolerance stacking across manufacturers. Use anti-walk pins only — anti-rotation pins are not compatible. Do not use the Atrius Super Selektor — incompatible and may damage the lower. Not compatible with cassette triggers.
Specs
| Lower Material | 7075-T6 Billet Aluminum — CNC machined |
| Finish | Type III Hardcoat Anodized — Black |
| Active Reset System | AS Designs ARC-Fire V2 — Ambidextrous |
| Selector Config | 0-90-180 standard — 0-45-90 and 0-45-180 available (contact us) |
| Markings | Laser engraved SAFE - SEMI - ARC |
| Ejector Lever | 4140 Steel — heat treated, oxide coated |
| Slip Trip | V5 — 7075-T6 Aluminum (installs into upper) |
| FCG | Mil-spec disconnector and springs — included |
| Pins | Anti-walk pins — included (anti-rotation NOT compatible) |
| Grip | Mil-spec AR grip — included |
| Design Credit | ARMP5v3 designed by s3igu2 — used with approval |
| Manufacturer | AS Designs — Active Safety Designs, USA |
State Restrictions: This product does not ship to California, Colorado, Connecticut, Delaware, Florida, Hawaii, Illinois, Massachusetts, Maryland, Minnesota, New Jersey, Nevada, New York, Oregon, or Rhode Island. Orders placed from restricted states will be cancelled and refunded.
Frequently Asked Questions
What is included in the ARC-Fire complete kit?
The complete kit includes the ARMP5v3 Rev. 2 lower, AS Designs ARC-Fire V2 ambi kit, AS Designs MP5 hammer, mil-spec FCG (disconnector and springs), anti-walk pins, Slip Trip V5, custom ejector lever assembly, and mil-spec AR grip. Everything needed to install — no additional parts required.
What is the difference between this and the Super Safety lower?
Both use the same ARMP5v3 Rev. 2 lower. The Super Safety ($649.99) uses the Hoffman Tactical 3-position cam system. The ARC-Fire V2 ($749.99) uses AS Designs' own ambidextrous system with configurable selector positions. The ARC-Fire V2 is AS Designs' flagship and is priced accordingly.
What ARC-Fire V2 configuration does this ship with?
The standard configuration is ambi 0-90-180. Contact us before ordering if you need a different selector position — 0-45-90 and 0-45-180 ambi configs are available, as is a non-ambi 0-90-180 option.
Which MP5 host guns is this compatible with?
Available in six variants: AP5 / ZF5 / MAC-5 / POF-5 (full size MKE clone), AP5-P / ZF5-K / MAC-5K (MP5-K size), H&K SP5 / SP5-L (full size HK), H&K SP5K / SP5K-PDW (K size HK), PTR 9C / 9CT / 9RS (full size PTR), and PTR 9KT (MP5-K PTR). Does not fit PTR or HK models not listed.
Does this require permanent modification to my MP5?
No permanent modification is required. Install the Slip Trip V5 into your existing MP5 upper and pin the new lower on. Some hand fitment may be required due to tolerance stacking across different host gun manufacturers.
Can I use anti-rotation pins with this lower?
No. Use anti-walk pins only — anti-rotation pins are not compatible. Anti-walk pins are included in the complete kit.
Which states does this not ship to?
This product does not ship to California, Colorado, Connecticut, Delaware, Florida, Hawaii, Illinois, Massachusetts, Maryland, Minnesota, New Jersey, Nevada, New York, Oregon, or Rhode Island.
Related Products & Resources
- AS Designs MP5 Super Safety Lower — Complete Kit ($649.99)
- All Super Safety & Active Reset Products
- FRT vs Super Safety — Full Comparison
- Are FRT Triggers Legal? — State-by-State Guide
- Best FRT Triggers for AR-15 — 2026 Buyer's Guide
Some hand fitment may be required due to tolerance stacking across different MP5 host gun manufacturers. AS Designs recommends installation by a qualified gunsmith. It is the buyer's responsibility to verify compatibility with their specific host gun and to comply with all applicable local, state, and federal laws. This product does not ship to CA, CO, CT, DE, FL, HI, IL, MA, MD, MN, NJ, NV, NY, OR, or RI. Design credit: ARMP5v3 by s3igu2 — used with approval. Original ARMP5 concept by UberPoor.
The AR-Takedown Tool (AR-TT)
- weight is only 58 grams, under 3oz
-Length: 6 5/16"
-Diameter 1/2"
-This is the ONLY USA made gun smithing tool, gun cleaning tool, building tool, disable tool on the market.
Customer Reviews
Overall rating: 4.4 / 5 from 1809 reviews.
I ordered this thinking I would beat the next stupid ban. So the trigger arrived very fast, just a few days, and I didn't pay for the extra shipping charge for getting it faster. Wasn't needed in my case. This was so easy to install a blind person could do it. Then I took it to the range and I expected it not to work like it was described. OMG did my face light up! Burned up two magazines in less than 10 seconds I think. And is still safe, and it retains the semi auto, or one shot per pull capability. I'm buying more for my other AR's now.
Second one i bought now and still flawless operation. Would recommend this product to anyone who likes to go through ammo.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Store owner replied: Hey, We are absolutely thrilled to hear that your second Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made) is delivering flawless operation! It's fantastic to know you're enjoying the product so much that you've come back for another, and your recommendation truly means the world to us. Our aim is always to provide high-quality gear that enhances your experience, especially for those who appreciate consistent performance. Thanks again for your incredible support and we look forward to serving your needs in the future!
It went great. Easy to install and it worked with all my stock parts.
100% USA Made Super Safety with Flat Trigger – On Sale $94.99
Store owner replied: Hey, We're thrilled to hear that your 100% USA Made Super Safety with Flat Trigger went great! It's fantastic to know that the installation was easy and that it worked seamlessly with all your stock parts. Your positive experience is exactly what we aim for at The Takedown Tools. Your feedback highlights our dedication to providing top-quality, compatible accessories for our valued customers. Thanks again for your wonderful review and for being a part of The Takedown Tools family. We hope to see you back for your next upgrade!
It wasn't exactly what I was expecting but I gave it a try. The installation video sucks because I couldn't see what he was doing but I ended up getting it. You have to learn how to run it as there's a little bit of a trick to it but once you do that it's fun to use.
Easy install, no problems.
Partisan Disruptor FRT (Black) + M16 BCG + H3 Buffer Bundle — AR-15 (USA Made)
This thing is more fun than a bucket of puppies
First time using the Disruptor drop-in trigger I couldn't get it to work, even after swapping in an H2 buffer. This H3 heavy-duty spring combo finally did the trick. Rifle is an older S&W Sport II. Suppressor is SilencerCo Velos 556. Very happy with the result and looking forward to adding Disruptor FRT and this buffer/spring to at least two more rifles.
Odin Works HFRT — All-In-One Buffer & Buffer Tube System for FRTs and Super Safeties
Store owner replied: Glad you loved it! Suppressed can be a fickle one too at times
Super easily installation. Works flawlessly, not one hiccup out of the few hundred rounds I’ve gone through so far.
Awesome and easy to install! I have a PSA 300blk and didn’t even need to change buffer weight to make it run great.
Hoffman Tactical Super Safety AR-15 100% USA Made
Store owner replied: Thrilled you love your product
I usually wear proper shoes and stand correctly but the urge hit me n I headed out the door lol, amazingly reliable and a blast to shoot
Third one from AR Takedown!!! This one is in a CMMG Banshee 45ACP
AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety
Had some initial issues with the trigger but customer service was easy to get ahold of and took care of me. Shipping was super fast, and everything is working as intended now. I wouldn’t think twice about ordering from them again.
100% USA Made Super Safety with Flat Trigger – On Sale $89.99
Install was fairly straight forward, no clear directions on instalation but easy to figure it all out. Function test went well.
AK-47 FRT Super Safety – 100% USA Made
Store owner replied: Hey Joel, This is GREAT to hear, and glad it was super easy
The FRT dropped right in and ran wonderfully! It cycled 22 rounds in roughly 2 seconds. My son's first experience firing anything like this and he absolutely loved it. I highly recommend this product for your TX22.
Easy to install, absolutely fun! Everyone that shoots it instantly start looking to buy one.
Best trigger on the market by far.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Sorry folks you will never find the 45 cal SMG out in the wild. Runs great with the Partisan Disruptor
2 pack combo Partisan Forced-Reset Drop-In Cassette Trigger FRT – AR-15 Platform (USA-Made)
Super easy to install works perfectly. I put this one in a ar9mm lower . I kinda like the push button now very smooth
Trigger Supply: Hoffman Tactical Super Safety – S7 Tool Steel – Flat Trigger | AR-15 USA Made
Safe, Semi, FRT. Until you experience it, you just don’t know what it’s like. But once you do know, you’ll want more. An addiction that is backed by the Constitution. 2A for LIFE.
Works perfect
Worked amazingly. Was everything I hoped it would be. Would definitely recommend these guys to anyone looking to purchase firearms accessories. Had a couple small order issues in the past and they were handled very quickly and expertly. As a result I try to give them as much of my business as possible.
Super easy to install, runs smooth and without failure in a completely stock $500 American tactical AR, there are plenty of videos showing how to install it. Would and am buying this trigger kit again, and pairing it with a lighter spring kit, there isn’t any weird quirks with it, I simply installed it with some oil and my factory pins and springs and it worked without polishing or any other modifications. Super happy with it!
AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety
Store owner replied: Hey, We are absolutely thrilled to hear that you found the AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety super easy to install and that it's running smoothly in your stock American Tactical AR! It's fantastic to know you appreciate the straightforward installation process and the reliable performance without any modifications needed. We truly value your feedback, especially hearing that you're so happy with your purchase. Your positive experience truly motivates us, and we are always striving to provide exceptional products that meet your needs seamlessly. Thanks again for your support, and we look forward to serving you with your next trigger kit and lighter spring setup.
Straight drop in, no modifications. Ran great no issues yet
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
All the literature online made it extremely easy to install. In my opinion this is the best one.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Store owner replied: Hey GLAD YOU LOVE IT!
Functioned fantastically. I absolutely recommend a heavier buffer. I have a Ruger AR lower and it fit perfectly. Really really enjoys the metal mags. Had loading issues, disappeared when I swapped to metal mags. Selector switch works slightly better than original. I used a extra spring I had laying around and got an H3 buffer. Make sure you have the full auto BCG or this product will not function.
Partisan Forced-Reset Drop-In Cassette Trigger (Black) FRT – AR-15 Platform (USA-Made)
I ended up needing something slightly lighter to run the G Lever FRS, but the H2.5 is probably a good option for a suppressed build with more back pressure
Had to do a minor tweak to tappet wire but other than that it was a drop in kit. Seems to be made of quality steel. We all are now having great fun with it.
Trigger worked perfect. Only thing I had to do was get a h3 buffer (heavy) tube and it was flawless. Dumped 2 mags in a matter of seconds.
Works flawless when you have a h3 buffer and im going to buy 5 more 😆 🤣
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Works great!
Love it!!!!, Works great!!!
Odin Works HFRT — All-In-One Buffer & Buffer Tube System for FRTs and Super Safeties
My first ARC-Fire ran like a champ! I never had a hiccup or problem, and everyone on the range stared like I was a criminal...🤣 It was the V1, and man I was happy. Then all of a sudden... I watched a video that showcased the ARC-Fire V2, with a 0-45°-90° ambi selector, and I had to have one. After all, it was going in my HK MR556 A4, and it has the markings on the lower for a 0°-45° selector, and I, of course, wanted it to match. So I bought one... While visiting AS Designs website, I noticed they sold HK style selector levers for their ARC-Fire V2. So I bought some... You CANNOT go wrong with this company! Their products are, in my and many others opinion, the best FRT on the market today! Just go to YouTube and pull up a 'Juicy Media' video, and he demonstrates a bunch of different brands of FRT and explains the pros/cons of the others, and explains why he prefers AS Designs! 5 MF'ing ☆'s~!!!
Works great with a h3 buffer, didn’t jam once
Simple to install, and fun to shoot
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Extra fast shipping, and price was below average market cost. Easy installation. I would recommend this FRT to anyone looking.
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)
Super easy install. Fast shipping
AS Designs ARC Fire Trigger | AR-15 Forced Reset Trigger | Ambi Safety
This enhanced semi-auto trigger is amazing the install was easy the function is great the only thing would be you need a t10 tool of your own to hold the other side. But overall 10/10 this mad my cheap Anderson ar turn heads!!!
Partisan Forced-Reset Drop-In Cassette Trigger (Black) FRT – AR-15 Platform (USA-Made)
Crazy fun and runs like butter
Partisan Disruptor FRT Trigger for AR-15 – Drop-In System (USA Made)