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Chris's Review of CMMG 22LR Mk4 Barrel Kits w/ Bolt Group
Bought this because my dedicated 9-inch upper was giving a supersonic crack with the Mini-mags and Win. M22 when suppressed . Slower ammo was not giving the boost for reliable function ( esp. with the binary trigger ) This unit allows for their use and still remain subsonic . I do wish it came with the forward assist block and the CMMG charging handle . In my limited use of this , built in a standard AR upper , it is reliable and fun .
The main advantage of a build on a standard upper rather than a CMMG dedicated upper is the difference in the machining of the uppers allows the use of the " Better Mag " adaptor which allows the use of the 25 round S/W AR15-22 mags and the 35 round Plinker's Tactical mags and have a true bolt hold open function rather than have the bolt close when you remove the empty mag .
Chris
The main advantage of a build on a standard upper rather than a CMMG dedicated upper is the difference in the machining of the uppers allows the use of the " Better Mag " adaptor which allows the use of the 25 round S/W AR15-22 mags and the 35 round Plinker's Tactical mags and have a true bolt hold open function rather than have the bolt close when you remove the empty mag .
Chris
Pros:
- Good Quality , reliable , compact even with a suppressor attached
Cons:
- none if good strong ammo is used
Best Used for:
- FUN , pest control
Would Recommend:
Yes
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