CMMG MOD4SA AR-15 5.56 NATO Semi-Auto Rifle, 16 in Heavy Bull Target Barrel (Unthreaded), 15 in Free-Float M-LOK Handguard, Ambi Safety, 30+1
This CMMG MOD4SA is a USA-made AR-15 in 5.56 NATO built around a 16 in heavy bull target barrel with a plain, unthreaded crown. It features a flat-top upper with forward assist, dust cover, and T-marked rail, plus a UTG PRO Super Slim 15 in free-float M-LOK handguard (MTU019SSM) with an anti-rotation clamp. Receivers are 7075-T6 aluminum with a matte black hardcoat anodized finish, and controls include an ambidextrous safety selector. Capacity is 30+1, with no sights installed.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Specific Condition Notes: Some light scuffs and wear are present on exterior surfaces.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
What’s Included
- 1x 30-round USGI-pattern aluminum STANAG magazine stamped NHMTG, Hartford CT
- Fixed metal sling loop on stock (no QD sling swivel included)
Built on the AR-15 platform with a semi-automatic, direct-impingement system, this MOD4SA pairs 7075-T6 aluminum receivers with a matte black hardcoat anodized finish for a proven, duty-grade foundation.
The 16 in heavy bull target barrel uses a plain, unthreaded crown. This configuration is not threaded and is set up specifically with a bull target profile as noted.
Up front, the UTG PRO Super Slim 15 in free-float M-LOK handguard (MTU019SSM) in 6061-T6 aluminum uses an anti-rotation clamp for secure alignment. The upper receiver is a flat-top with a forward assist, dust cover, and a T-marked rail. No sights are installed.
Furniture includes a 6-position collapsible stock with a 12.75 in length of pull and an A2-pattern polymer pistol grip. Controls feature an ambidextrous safety selector. Capacity is 30+1 with the included USGI-pattern magazine.