Rock River Arms BB0301: 16″ 5.56 AR-15 Upper Review
The Rock River Arms BB0301 is a complete 16-inch mid-length 5.56 AR-15 upper with M-LOK and BCG. Specs, price, and how to win one free July 24–25.
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Plain-English references worth bookmarking — the gear terms behind every review, plus NFA and carry law.
Gun & gear glossary
| Term | Category |
|---|---|
| Striker-fired | Action |
| MOA | Optics |
| Twist rate | Ballistics |
30 gun, ammo and optics terms explained in plain English.
Open the glossary → Network2A & gun-law glossary
| 2026 at a glance | |
|---|---|
| NFA tax stamp | $0 |
| Permitless carry | 29 states |
| Suppressors legal | 42 states |
50+ NFA, carry and gun-law terms, from Freedom's Lodge.
View full chart →Reader Favorites
Buying InfoMost Expensive Guns in the World (2026)Gun RightsATF Rule Changes 2026: The 5 That MatterAccessories & GearOptical Sights for Your Gun, ExplainedReviewsBest Budget Optics-Ready 9mms Under $550100 Days of SilenceBest Reloading Kit for BeginnersShotgunsBenelli M4 Tactical Shotgun ReviewBy BrandKimber Micro 9 ReviewReviewsRuger Harrier Rifle Review100 Days of SilenceRuger PC Charger ReviewAmmoAmmo Shortage 2026: Which Calibers Are Hit
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Auto-Ordnance M1 Carbine SBR: Specs, Price & Giveaway
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Staccato HD P4X: The Steel-Frame Duty 2011 Built for the Belt (2026)
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Red Dot Footprints Explained: How to Match a Pistol Optic to Your Slide
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