CAM-LOK® barrel adapters

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The CAM-LOK® (Covert Application Mount - Locking) Universal piston system is comprised from two parts, the piston or CAM-LOK® direct thread adapter, and the barrel adapter.  This product page is for the barrel adapter (smaller black component pictured). 

The Griffin Armament CAM-LOK® interface affords the user the ability to convert the suppressor to a much faster and more secure mounting solution on pistols vs it's legacy technology, single piece, direct thread piston counterparts.  This system provides a rapid, secure attachment to the host pistol.  Direct thread single piece pistons have several negative attributes.  They do not accept tools, and are hand tightened to the host firearm. As a result of hand installation, they loosen when the piston system reciprocates under slide cycling during the firing sequence.  This vibration and inadvertent loosening of pistol silencers, requires end users to constantly check tighten pistol silencers.  This periodically causes users to have "bad range days" with unforeseen baffle strikes and end cap strikes.  These unfortunate events cause logistically burdensome work for consumers to communicate with service departments, ship products back and forth, and sometimes assume charges for repair for these issues.  

No longer do users need to worry about their pistol suppressors loosening during use (as with traditional fixed direct thread pistons).  The CAM-LOK® interface supports a 3/4" socket wrench for installation with prevailing torque, and features a taper locking system, which encourages secure attachment, despite the piston still actuating for and aft during the firing sequence.  The piston or CAM-LOK® direct thread adapter can be attached / detached in any one of three, 120 degree positions, ensuring there are no "false positive" interfacing positions to slow deployment of the suppressor onto the host firearm.  Additionally, the manufacturing accuracy of the interface is held to Griffin Armament's high quality standards for squareness, and concentricity, ensuring that each mounting position has similar and minimal POI shift influence. To support this, the mating pistons and CAM-LOK® direct thread adapters have all mating diameters and interfacing geometry qualified in a single operation, for tool quality accuracy and perfection.  A similar manufacturing theory was applied to the barrel adapter for maximum alignment accuracy.  

End users benefit from being able to attach their silencer to various adapter interfaced host firearms, without having to disassemble the suppressor and change the piston to a different thread pitch.  The piston is "universal"; accommodating any pistol mounted with a 3 Lug universal barrel adapter.  Additionally, end users with different brand suppressors supported by the CAM-LOK® piston family, will be able to benefit from the interchangeability of CAM-LOK® QD barrel adapters between CAM-LOK® piston models. This adapter also acts as a thread protector for the more expensive barrel's threads which when used with fixed pistons, are traditionally exposed. 

 9mm versions are shorter  .45 caliber versions feature an extended cylinder to attach to the larger diameter barrels. 

Installation & Use Notes  : Suppressor should be tightly assembled when using this product to avoid inadvertent disassembly of the suppressor when removing it from QD barrel adapter. Barrel adapters should be installed to their host firearms with a minimum torque rating of 20 ft/lbs using a 3/4 socket and needle type torque wrench.  Use of a box end wrench will not have optimal contact with the wrench flat geometry on the adapter and may damage the adapter.

*NOTE*   "1/2x28 special" is intended for compact 9mm pistols which generally have smaller outside diameter barrels and thus no typical thread shoulder.  Examples are : Sig P365, Glock 43. Glock 48... etc.   Users with mid to full size handguns should choose the standard "1/2x28" size

FOR FIXED BARREL APPLICATIONS (PISTOL CALIBERS ONLY)  : This can be accomplished using one of our CAM-LOK® direct thread adapters, in conjunction with a CAM-LOK® barrel adapter. 

Features :

  • CAM-LOK® (Covert Application Mount - Locking) Patented Universal QD piston attachment system
  • 3 mounting positions, 120 degrees separated for rapid mounting
  • Forward taper surface locks in place with interfacing piston and drastically reduces or eliminates common baffle/end cap strikes 
  • Coarse threads are top cut to increase durability and wear resistance
  • 3/4"or 19mm wrench pattern accommodates socket wrench for secure and easy installation 
  • Compatible with Universal QD pistons (sold separately)
  • Compatible with Universal Direct Thread Adapters (sold separately) 
  • Internal bore reduces side concussion and visual disturbance vs blind muzzle
  • Total system weight is identical to legacy direct thread pistons
  • QPQ Nitride finish for attractive, durable black finish
  • 17-4 stainless steel material
  • Also supports Universal Carry Comp

Additional Details

.40 cal
.45 cal
Thread Pitch:
Thread Pitch:
1/2x28 Special
Thread Pitch:
1/2x28 SMG/PCC
Thread Pitch:
Thread Pitch:
Thread Pitch:
Thread Pitch:
13.5x1mm LH
Thread Pitch:
14.5x1mm LH
Thread Pitch:
16x1mm LH
Thread Pitch:
16x1mm RH
Attachment System:
Type of Part:
Barrel Adapter


31 Reviews

  • 5
    9 mm adapter

    Published by David Neal on 17th Sep 2022

    This adapter fot perfectly on my p320 and mr920
    The adapter work well on p320 and MR920 without any issues

  • 5
    Cam-lock bbl adapter

    Published by Steven Dominguez on 6th Sep 2022

    The bbl adapter is a precise addition to my threaded bbl's, i can switch my suppressor from hand gun to hand gun with no problem, love it. Thanks Griffin

  • 5

    Published by Steven Dominguez on 6th Sep 2022

    The bbl adapter is a precise addition to my threaded bbl's, i can switch my suppressor from hand gun to hand gun with no problem, love it. Thanks Griffin

  • 5
    Cam Lock

    Published by Barry Brown on 19th Aug 2022

    Fits perfectly

  • 5
    Must have

    Published by Jimmy Wusinich on 17th Aug 2022

    I have now 2 of these badboys, I highly recommend using thread sealer also from Griffin Armament. Came loose a few times because I didn’t tighten it enough , I’ll be buying more of these in the near future most definitely. Another success from Griffin Armament. I salute you Griffinights!!!

  • 5
    Cam lol barrel adapter

    Published by James Martinez on 13th Aug 2022

    Great quality finish was good very easy to use great investment

  • 5
    Cam Lok Genius

    Published by James Wusinich on 25th Jul 2022

    Best device I’ve ever purchased for my suppressors. Easy to install, easy to pay the fair price for something that works efficiently and effectively. I have a deep love for Griffin Armament. I’ve purchased their barrels, AR parts, AR uppers, muzzle devices , , suppressors, Iron sites, you name it. When it comes to buying from this company, I do it with pure confidence. Top tier quality products from genius imagination. I need a new T-shirt from them, my x stole mine. If I ever have a kid his or her name will be Griffin Armament. Thank you Griffin armament staff for answering all my dumb questions and providing a variety of successful products that keeps me sincerely excited for what comes out next. Cheers to the Griffin.

  • 5

    Published by Dave on 1st Jul 2022

    This is a very good quality adapter enabling me to use the Optimus 9 on my Sig P320. Ordering it was easy and it shipped immediately.

  • 5

    Published by Unknown on 29th Jun 2022

    Suppressor revolution 45
    calibers tested 9MM / 38 super/ 40 Smith Wesson/ 45ACP
    product tested cam-lok
    Target set at 15 yds
    reliability test
    I loaded two magazines for each firearm had a oven Mitt with me and was gonna switch the suppressor after each mag. The ease that I went from one firearm to the other was absolutely incredible I went through all eight magazines of different calibers with no failures also the POI was is extremely minimal. I waited an hour and repeated the test with the same results, the engineers that developed this deserve a day off !!

  • 5
    Best QD attachment device

    Published by Jeff Rodeman on 27th Jun 2022

    I always hated when a suppressor would walk-off the barrel with a direct thread attachment. This makes attachment and detachment of the suppressor super easy and fast, just like in the movies, when paired with the GA Cam-Lok booster piston. This is my 3rd one and love the ease and security of moving from one pistol to the next. So glad I went with this system.

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