Your one stop AR Shop! For everything we don't have here, check out our second website www.brassgrabber.com
The Auxiliary Spring Rate Kit for the JP Silent Captured Spring allows custom tuning of the device to a given rifle. While the default spring installed in the JPSCS is selected to offer the best performance for the widest range of configurations, a simple disassembly and reassembly of the JPSCS with a slightly different spring rate can yield truly optimized performance, particularly for rifles without an adjustable gas block.
In selecting a spring for your rifle, install a heavier spring if you feel the buffer head fully compress and bottom out while firing the weapon. If the bolt carrier will not lock back reliably on the last round fired, even when completely gassed (in the case of an adjustable gas block), select a lighter spring.
In particular, if you have an ambidextrous bolt catch extension installed (e.g., the Magpul BAD lever), this extra mass on the bolt catch, in combination with the faster bolt velocity using the SCS with a heavier spring, may cause the bolt to ride over the catch before it has time to engage. In this case, a lighter spring should remedy the problem.
The included springs from lightest to heaviest are listed below with the color with which they are coded:
One spare guide rod retainer screw is also included in case of thread stripping during disassembly.
Guns are a lifestyle to us so you know that you will receive the best of service and will always be informed of the latest in technologies. We are a dealer in quality modern AR style rifles, handguns, parts, accessories, and other self defensive items. We have everything from budget to top of the line parts for you next AR build. Come in and check out our Build-A-Gun wall which has everything you need to build a complete AR. We've also started getting in Varminting rifles and supplies! Our website is integrated with our inventory system so everything is always up-to-date and we can do curbside delivery if need be.
We are a dealer in the following manufacturers: Alien Gear Holsters, Bigfoot Gun Belts, Safe Life Defense, Radian Weapons, Odin Works, CMMG, Rise Armament, Rosco Manufacturing, Spike's Tactical, Ballistic Advantage, and Aero Precision. If you are interested in anything they have to offer, please stop in and we can order anything you may want at the same price while supporting a small business!
Don't forget to check out our second site for things we don't currently carry in stock! www.brassgrabber.com
$20 for all firearms on a single invoice and $5 extra for each separate invoice.
$40 for all firearms that we have the ability to get in for a similar price.
$65 for all NFA transfers.
Located in the Lockwood Strip Mall next to Dairy Queen.
2750 Old Hardin Road, Suite D Billings, MT 59101
Tuesday - Saturday
10a.m. - 6:30p.m.
Sunday - Monday