Easy to install magazine extensions increase capacity of your 12 Gauge shotgun.
Machined from super-strong chrome moly steel tubing. The seven-shot extension allows for two extra rounds, the eight-shot adds three and the ten-shot adds five more rounds to the shotgun's capacity. Ten-shot extensions include a Barrel/Magazine Clamp and all extensions include a new spring. (Note: For 12 gauge only)
Magazine Extensions available for 12 gauge only
Mossberg 930/935
Benelli M1/M2/M4,Nova, Super Nova,
Remington 870/1100/1187,
Winchester 1200/1300 Defender/Black Shadow
Reviews
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M4 extension
First, good shipping time. This extension fits perfectly on my M4 without tools. The only things, the way it is design, it is not a +2 shells extension but a +1 instead. I'm using 2 3/4 inches shells and I can only fit 6 shells. Its missing a good inch inside the tube for the 7th to fit. The package said +2 shells but its wrong. But its okay I gained 1 shell and the look is better than the factory extension.