ModernMarksman.com is your headquarters for gas blocks for AR-15 and AR-10s. We carry everything you need to build or customize your new or old favorite AR-15 or AR-10. We carry all the top brands of gas blocks from VLTOR, Battle Arms Development, Troy, CMMG, and Geissele. We have hundreds of AR parts, AR stocks & AR grips to choose from in all different colors, shapes, and sizes.
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