Join the #1 community for gun owners of the Northwest
We believe the 2nd Amendment is best defended through grass-roots organization, education, and advocacy centered around individual gun owners. It is our mission to encourage, organize, and support these efforts throughout Oregon, Washington, Idaho, Montana, and Wyoming.
Discuss firearms and all aspects of firearm ownership
Join others in organizing against anti-gun legislation
Find nearby gun shops, ranges, training, and other resources
Discover free outdoor shooting areas
Stay up to date on firearm-related events
Share photos and video with other members
...and much more!
bcm upper
BCM theory, BCM synaptic modification, or the BCM rule, named for Elie Bienenstock, Leon Cooper, and Paul Munro, is a physical theory of learning in the visual cortex developed in 1981.
The BCM model proposes a sliding threshold for long-term potentiation (LTP) or long-term depression (LTD) induction, and states that synaptic plasticity is stabilized by a dynamic adaptation of the time-averaged postsynaptic activity. According to the BCM model, when a pre-synaptic neuron fires, the post-synaptic neurons will tend to undergo LTP if it is in a high-activity state (e.g., is firing at high frequency, and/or has high internal calcium concentrations), or LTD if it is in a lower-activity state (e.g., firing in low frequency, low internal calcium concentrations). This theory is often used to explain how cortical neurons can undergo both LTP or LTD depending on different conditioning stimulus protocols applied to pre-synaptic neurons (usually high-frequency stimulation, or HFS, for LTP, or low-frequency stimulation, LFS, for LTD).
Beautiful new build. Gauged the headspace, pieced this beautiful upper together using a stripped forged Milspec 7076T6 aluminum upper and a 12 inch BCM QRF(Quad rail free floated), it has a Surefire closed tined flash hider suppressor mount muzzle device, a Microbest Phosphate bolt and carrier...
I’m sending my upper back for a refund to fund a couple optics I have in mind. Before I do I wanted to give anyone in WA who might be looking to get a BCM upper a chance to snag one rather than send it back. They’re hard to come by so if you want it, better get it. I’m going to be sending it...
Selling my ar15, parts listed below
Factory built bcm 16inch upper
Toolcraft bcg
Radian raptor sd ch and talon safety
Sico ambi lower
B5 stock
Magpul grip
Larue trigger
Cmmg lpk
(Eotech and riser not included)
Buyer pays for transfer
Bcm upper 16 inch bhf barrel qrf12
$480 without bcg or ch, $500 with BCm mod 4 charging handle
Trade to exps or aimpoint t2, other red dot too..just send me offer..
Well loved BCM 11.5 Upper needs a new home. No BCG No Carry handle. About 1800 rounds through this still serviceable.
FSOT
Silver, Optics in green or EOTECH Paypal Friends or family/Venmo no comment will consider shipping.
BCM upper receiver for sell mlok handgaurd Magpul flip up sights Eotech sight comes with it SureFire muzzle break it is pin and welded for legal purposes to make it 16 in barrel low pro gas block also BCM carbine length gas tube Franklin armory BCG Radian raptor charging handle the barrel came...
BCM Upper Receiver - M4 Flat Top Complete (Unassembled) - DEMO/Scratched, never used, has a minor blemish but nothing affecting usability. Cash only no trades.
Been sitting in a drawer . It’s solid. Trades or cash.
13.7” ballistic advantage Hanson profile black barrel with the nickle M4 extension
These have cross pinned gas blocks and are solid
Spikes upper Spider logo
BCM 13” M lok handguard
Gamma VG6 muzzle device
Does it say BCG and CH. No.
$400...
Sorry, this item has sold
New BCM upper receiver with dust cover and forward assist (with logo and new embossed BCM star)
(factory assembled)
Please PM me for any questions
I take PayPal friends and family
Shipping OK, S/H $4.99
No trade requests please.
No separate part sales please
No...
Selling to fund a different build. It’s a 14.5 BFH govt profile pinned and welded to 16”, still in its original box in the oil. I paid $1005 plus tax and shipping so I think $975 is pretty fair. Only partial trade I would consider is cash + a red dot in good condition.
Up for trade mostly, potentially for sale, is my AR. It’s a factory BCM MCMR 16” upper with a Sig Romeo 5 sitting on a PSA meme lower and with a BCM LPK and trigger. Has a Magpul pistol grip, fore grip and, CTR stock. Has a NiB BCG and a Radian Raptor charging handle. Will NOT include the light...
I have a Aero and BCM complete combo. Asking $800. Motivated to get this sold. Entertaining all reasonable offers.
-Aero M4E1 lower
-BCM ELW 16” upper 5.56
-Aero LPK with trigger
-BCM stock
-Radian charging handle
-Aero BCG
-Magpul K2 grip
-Magpul VFG
BCM upper no rounds through it bought from website has some scuffs from back up sights but in good condition
No bolt carrier
No charging handle
A2 flash hider
https://bravocompanyusa.com/bcm-standard-16-mid-length-upper-receiver-group-w-bcm-mcmr-15-handguard/
Selling an extra BCM upper I haven’t put to use.
It has some scratching on the outside of it but never bothered me.
Has forward assist and dust cover installed.
Asking $60
Will trade for red dot (I can add cash), 9mm/40/45/.223 ammo
Sorry, this item has sold
New un-logoed BCM Upper receiver
For those of you (like myself) who do not want logos on their rifles.
There is oil on it.
Please PM me for any questions
I take PayPal friends and family and Venmo
Shipping OK, S/H free
No trade requests please.
No separate part...