Home AR-15 Product Spotlight: B5 Systems Collapsible Precision Stock

Product Spotlight: B5 Systems Collapsible Precision Stock

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Brownells Gun Tech™ Caleb Savant continues his survey of the B5 Systems stocks for the AR-15 platform. Today, the Collapsible Precision Stock is in the spotlight. You can easily adjust both the CPS’s cheek rest height and length-of-pull simply by turning the adjustment wheels. The wheels turn with distinct, tactile clicks, and once you get the cheek rest and recoil pad where you want them, they are reassuringly solid, with no play or wobble.

The Collapsible Precision Stock fits mil-spec (1.14″ O.D.) or A5-type AR-15 carbine receiver extensions (buffer tubes). Unlike a lot of precision stocks for the AR-15, you can extend and retract the CPS just like a standard M4 carbine stock. Move the little slider on the release lever to make the stock captive to the buffer tube, so you can’t accidentally pull it off when extending it. Don’t worry, the full extend / retract range is preserved.

More features of the CPS: QD sling swivel sockets on both sides, plus bars for simple thread-on sling mounting. M-LOK® slots on the underside are ready for a compatible M-LOK® monopod. You can get your CPS in popular AR-15 colors, including basic black, Flat Dark Earth (FDE), O.D. Green, Caleb’s favorite Wolf Gray, and a Brownells Exclusive, Multi-Cam.

B5 Systems offers the Collapsible Precision Stock with three different-sized cheek rests. The MEDIUM is for standard .223 / 5.56 AR-15s. Even with the stock fully collapsed, you’ll have enough clearance to operate the charging handle. The SHORT model provides more clearance for the longer charging handle of an AR-308. The LONG cheek rest is for AR-15s fitted with the Law Tactical Folding Stock Adapter AND/OR the longer A5 buffer tube. It gives you enough cheek rest real estate to position your head where it needs to be on the longer stock.

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42 COMMENTS

  1. Good stock but it lacks shoulder purchase area and the butt plate isn't adjustable for height or cant like the Magpul PRS Gen 3. I ended up replacing the B5 CPS with a PRS Gen 3, a world of difference in terms of dialing in your fit with a rifle.

  2. Question: with the Long you recommend on the A-5 tube, wouldn’t the charging handle movement be hindered by the cheek piece being moved further forward in the fully collapsed position? Right now my charging handle has only about a half inch to an inch clearance from the cheek piece on the Medium length with the stock fully collapsed. I do see what you mean about your cheek position but couldn’t this be improved by adjusting the LOP?

  3. I have collection of stocks both in Bravo and Sopmod and all of them have a side to side play on a Milspec Carbine buffer tube (both DD and Geissele). How is the side play on this one?

  4. just my experience. I put a law folder on a 308 ar 10, and it snapped the "button" off from excessive recoil, causing it to just flop around not being able to lock. while law tactical sent me a replacement part free of charge (boss move) i would recommend using it on calibers smaller than 308 for the time being. some constructive advice id give is beef up the locking bar/latch area, once that breaks, the rifle is pretty much disabled without a quick fix. so far has been super convenient on my ar15 tho, no problems to report there. can't wait to see the law tactical folder sequel!

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