The Spikes Tactical 5.56 Midlength CHF 16-Inch Complete Upper with a 12-inch BAR2 rail (brand part no. STU5435-R2S) is a build-to-order upper from Spikes Tactical that arrives inspected, tested and ready to drop in. It pairs a 16-inch, mid-length cold hammer forged barrel in 5.56 NATO with a one-piece 12-inch BAR2 free-floating rail. The barrel has a 1/7 twist rate and wears an A2 flash hider. Every built upper is test fired before it leaves the shop, so the function check is already done.

Key Specifications

• The chamber is 5.56 NATO, with an M4 feed ramped barrel extension.
• The barrel is 16 inches long and cold hammer forged to an optimal profile in a mid-length gas system length.
• The barrel steel is DIN 21CrMoV511, chrome lined to M249 spec for a listed service life of 20,000+ rounds.
• The twist rate is 1:7, a fast twist that stabilizes heavier 5.56 bullets.
• The muzzle is threaded 1/2×28 and carries an A2 flash hider with a 1/2-inch crush washer.
• The handguard is a 12-inch BAR2 rail, a one-piece free-floating rail in 6061-T6 with a 7075-T6 barrel nut and QD attachment points.
• The gas system is mid-length with a .750 gas block seat, a low profile .750 I.D. billet steel gas block and a black nitride gas tube.
• The upper receiver is forged 7075-T6 aluminum with a forward assist and an ejection port door with spring and rod.
• The bolt carrier group is a phosphate M16 complete BCG, high pressure tested and magnetic particle inspected, with a forged aluminum Type 3 charging handle.
• The upper weighs 4 pounds 5 ounces and the barrel has a mil-spec phosphate coating.

Frequently Asked Questions

Does this upper include a bolt carrier group and charging handle? Yes. Spikes Tactical lists a phosphate M16 complete bolt carrier group and a forged aluminum charging handle.

What rail does it have? It has a 12-inch BAR2 free-floating rail with a continuous top rail and QD attachment points.

What gas system length is it? The upper is mid-length gas, with a .750 gas block seat and a mid-length gas tube.

Buy the Spikes Tactical 5.56 Midlength CHF Complete Upper with 12-Inch BAR2 Rail

A complete upper with the free-float rail already fitted is the quickest way to a finished rifle. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more AR-15 uppers for your lower.