Home / Accessories / Rail Kits / Pro S4 / Benelli M4 Quad Rail Kit Sale! Pro S4 / Benelli M4 Quad Rail Kit$18900 Original price was: $18900.$16500Current price is: $16500. Compatible with the Black Aces Tactical Pro S4 & Benelli M4 No gunsmithing required One-piece T6 6061 construction 8-ounce weight Black anodizing coating Full installation kit included Pro S4 / Benelli M4 Quad Rail Kit quantity Add to cart SKU: BQR4 Categories: Accessories, Rail Kits Product ID: 2770 Additional information Additional information Weight 3 lbs Dimensions 4 × 4 × 18 in Related products Sale! Mossberg 930 Quad Rail $15900 Original price was: $15900.$14500Current price is: $14500. Add to cart Sale! Mossberg 500, 590, and Maverick 88 Quad rail kit $15900 Original price was: $15900.$14500Current price is: $14500. Add to cart Out of stock Sale! Saiga Style 10 Round Magazine $2800 Original price was: $2800.$2300Current price is: $2300. Read more