BLACKHAWK! BREACHERSGRIP SHOTGUN STOCK User Manual
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BLACKHAWK!®NORFOLK, VA U.S.A. 1.800.694.5263
50107103 REV. 07.09
Page 1
Installation Instructions
ATTENTION: Read and follow all instructions and warnings prior to installation and/or
firing a BreachersGrip equipped shotgun. Take extra time to review the shooting tips
& techniques section of this manual. If you are at all unsure of your ability to install
your BreachersGrip stock safely, please seek the services of a competent gunsmith.
WARNING: Before beginning stock installation, make sure that the shotgun is
UNLOADED. Carefully check the chamber and magazine tube making both visual and
touch verification.
WARNING: The Knoxx BreachersGrip is NOT compatible with the
Mossberg 590 DA. Use of the BreachersGrip with the Mossberg 590 DA will cause
product failure and possible injury.
WARNING: Remington 870 BreachersGrip CAN NOT be used with oversized or
extended safeties. Oversized or extended safeties will cause product failure and possible injury. Contact BLACKHAWK! customer service for recommended safety options.
NOTICE: The BreachersGrip is not compatible with the FN "Tactical" Shotgun. Prior to
installing a BreachersGrip the "Tactical" trigger group must be replaced with a
standard Winchester 1300/FN Police trigger group. Contact Winchester or FN for
replacement trigger group.
TOOLS REQUIRED:
• Socket Wrench, Long Extension and Sockets
• Medium Phillips Screwdriver
• Large Flat Blade Screwdriver
• Extended “Ball End” Allen Wrench
Remington 3/16” (SAE) - Moss., Win., FN 1/4” (SAE)
Upgraded allen wrench is available from BLACKHAWK!
1. Remove original stock. Refer to manufacturer’s instructions for the best method to
remove stock. Normally the pad is held in place by two Phillips screws and the stock
is held on by one bolt. Remove the pad by unscrewing the Phillips screws and remove
the stock bolt to free the stock from the shotgun. (Fig. 1) Remington owners: Remove
any metal spacers from the back of the receiver.
Fig. 1
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BLACKHAWK!®NORFOLK, VA U.S.A. 1.800.694.5263
2. Attach the BreachersGrip to the shotgun by aligning the pistol grip with
the rear of the shotgun receiver. (Refer to Fig. 2) Using the appropriate
Hex wrench, tighten the pre-installed Hex head bolt firmly to complete the
installation.
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Fig. 2
NOTE: For Mossberg SpecOps only, remove rubber o-ring from stock bolt.
Remove o-ring by inserting ball end allen wrench into hole located on the
bottom of the SpecOps Stock. Turn wrench counter clockwise while
applying pressure to the bolt with finger. Turn wrench until rubber o-ring is
removed.
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NOTE: For all stocks, the rubber o-ring is for packaging use only. If a loose
o-ring is found in the stock packaging, disregard and dispose of it.
NOTE: If the stock is loose or if there is a significant gap between the stock
and receiver after completely tightening the bolt, then two issues may exist.
Issue 1; the bolt has been cross threaded into the receiver nut. Issue 2; there
is debris (powder residue or old thread locking compound) in the receiver
nut that is not allowing the stock bolt to fully engage with all the receiver nut
threads. To clean receiver nut threads, take a small diameter barrel brush
(Approx 1/4” dia.) and insert repeatedly into receiver nut until excess
material has been removed. Re-install stock.
NOTE: For Winchester BreachersGrip, there should not be a gap between stock
and shotgun after installation. Continue to tighten bolt until gap is closed.
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BLACKHAWK!®NORFOLK, VA U.S.A. 1.800.694.5263
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