CMMG 4.5" .22LR Medium Contour AR-15 Barrel and Collar
Note: NFA laws apply to this product. It must be attached to a pistol or a legally registered SBR.
- Easily convert your AR-15 to 22lr to save money on ammo
- Attaches like a standard AR-15 barrel
- Great for training people on how the AR-15 weapon system functions
- Made from high quality 4140 Chrome Moly Steel
- Salt bath nitride finish
- Threaded 1/2x28 so you can attach standard .223/5.56 muzzle devices
A leading manufacturer of AR-15 rifles, kits, and accessories, CMMG Inc. was established in 2002. Constantly pushing the edge, CMMG strives to develop and improve bringing you a product lineup that is second to none.
Ratings & Reviews
by Eric -
Bought this for an AR-22 build. Also bought a CMMG conversion kit. Good way to get a bolt and magazine for the build. Bolts were difficult to find in stock. Finished built shoots fantastic.
Fantastic, Fun, & Accurate for Length of Barrel
This 4.5 in barrel with dedicated collar is awesome! I am able to constantly hit my 3" gongs at 50 yards and my 10" gong at 100 yards with decent grouping in the paint. The optic used on the upper is a Sightmark Ultra Shot Z Reflex. This is one of my favorite uppers and I take it to my range all the time.
Keeping everything subsonic!
This little barrel is a must if you want to build a dedicated AR pistol in 22lr for use with a suppressor. Mini-mags will come out at subsonic speeds. The only round I have found that goes super is the Stinger. Plenty accurate and with the CMMG BCG the gun will run like a sewing machine. All you need is a upper, barrel nut and your favorite hand guard. If you own a 22 suppressor this little barrel allows means you no longer need to buy subsonic 22 ammo. Just tons of fun.