I bought the non-hard chrome version of one of these a few years back and wasn't impressed by Wilson's much touted and vaunted quality. The unit worked fine, but it had machining marks as if they didn't finish it or it was someones first day on the job.
https://shopwilsoncombat.com/BOLT-C...ROOF-COSMETIC-BLEM/productinfo/TR-BCABP-C-BL/
https://shopwilsoncombat.com/BOLT-C...ROOF-COSMETIC-BLEM/productinfo/TR-BCABP-C-BL/
Built in-house on our automated Nakamura CNC machines with the most up-to-date materials and technical specs, these are among the finest AR bolt carrier assemblies available on the market. Like all Wilson Combat accessories under our "Bullet Proof®" service policy, if the product ever fails we will repair or replace it at no cost to you-no strings attached.
The Bullet Proof® bolts are finely machined from 9310 AQ aerospace quality tool steel bar stock, heat-treated to Mil-Spec core hardness with a case hardened surface. 9310 AQ achieves high core strength and maximum toughness for this application. A snug fitting 302 stainless helical one-piece gas ring is used for optimal gas seal and extended service life.
The extractor is fully machined from 4140 bar stock, properly heat treated, stress relieved and phosphate coated for non-slip extraction. The extractor uses an extra power chrome silicon spring with inner buffer and "Crane" O-ring for positive extraction and long service life.
The bolt carrier is precision machined from 8620 tool steel billet and then precisely heat-treated to meet or exceed military specifications.
The gas key, a critical component for reliability is fully machined from 4140 steel, heat-treated, and installed with both high strength, heat resistant sealant, and 170,000PSI screws torqued to 55-58 inch pounds and staked so you never have to worry about the gas key coming loose and causing a malfunction.
These advances in manufacturing and materials have greatly enhanced the reliability, performance, and lifespan of the most critical part of your rifle.
- 9310 AQ Bolt, properly heat-treated, stress relieved and MPI inspected with a stainless, helical gas ring
- 8620 machined "full auto" style bolt carrier
- 17-4 stainless steel corrosion-resistant firing pin
- 4340 fully machined cam pin
- Carrier, bolt, gas key, gas key screws, and cam pin are hard chrome finished for reduced friction, increased durability, and ease of cleaning
- Drop-in fit for any quality 5.56 case head based AR rifle (.204 Ruger, .223/5.56 NATO, 300 HAM'R, .300 Blackout, 7.62X40 WT or .350 Legend)
- Marked BL to indicate BLEM Part
- NON RETURNABLE
NOTE- The only difference between "semi-auto" and "full-auto" carriers are the carrier weight and external profile. The "full-auto" carrier is USGI standard and slightly heavier to provide more mass and lower cyclic rate that can benefit carbine length and shorter gas systems, short-barreled/suppressed rifles, and machine guns. The "semi-auto" carrier is slightly lighter to provide the least amount of recoil impulse for rifle-length gas systems and its design makes reinstalling the firing pin easier after cleaning.
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