{"id":2845,"date":"2018-12-05T16:24:59","date_gmt":"2018-12-05T21:24:59","guid":{"rendered":"http:\/\/shootingsight.com\/?post_type=product&#038;p=2845"},"modified":"2026-06-24T02:59:08","modified_gmt":"2026-06-24T06:59:08","slug":"drilled-m14-spindle-valve","status":"publish","type":"product","link":"https:\/\/shootingsight.com\/?product=drilled-m14-spindle-valve","title":{"rendered":"Drilled M14 Spindle Valve"},"content":{"rendered":"<p>Reduced flow spindle valve for the M14, limiting gas flow with heavier loads, or when firing suppressed, so the op-rod does not get over-stressed.<\/p>\n<p>These are new production, based on the USGI drawings that have been cross-drilled with a 0.052\u2033 opening.\u00a0 With these, the two valve positions will be Full Flow \/ Reduced flow, versus On\/Off.<\/p>\n<p>While there are many combinations of load, bullet, barrel length and suppressor design, so it is impossible to pre-determine what will work best, the expectation is that 0.052\u2033 is likely too small, and if you single load, the bolt will not lock back on an empty magazine.\u00a0 So using a pin vise and wire number drill sizes, you would enlarge the 0.052\u2033 hole at the entrance, so you have a 0.052\u2033 exit and a 0.054\u2033 entrance, and try again.\u00a0 Next, enlarge both holes to 0.054\u2033, etc, one step at a time until it just locks on an empty mag.<\/p>\n<p>\u00a0<\/p>\n<p>Since these do not change the exterior design, they are legal for use in the Service Rifle class.\u00a0 If your only goal is to shoot suppressed, the externally adjustable valve I make is not match legal, but is easier to adjust for shooting suppressed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Reduced flow spindle valve for the M14, limiting gas flow with heavier loads, or when firing suppressed, so the op-rod does not get over-stressed. These are new production, based on the USGI drawings that have been cross-drilled with a 0.052\u2033 opening.\u00a0 With these, the two valve positions will be Full Flow \/ Reduced flow, versus [&hellip;]<\/p>\n","protected":false},"featured_media":7094,"comment_status":"open","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"product_cat":[32],"product_tag":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"Reduced flow spindle valve for the M14, limiting gas flow with heavier loads, or when firing suppressed, so the op-rod does not get over-stressed. These are new production, based on the USGI drawings that have been cross-drilled with a 0.052&quot; opening. With these, the two valve positions will be Full Flow \/ Reduced flow, versus\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/shootingsight.com\/?product=drilled-m14-spindle-valve\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ShootingSight - Engineered Excellence for Shooters\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Drilled M14 Spindle Valve - ShootingSight\" \/>\n\t\t<meta property=\"og:description\" content=\"Reduced flow spindle valve for the M14, limiting gas flow with heavier loads, or when firing suppressed, so the op-rod does not get over-stressed. These are new production, based on the USGI drawings that have been cross-drilled with a 0.052&quot; opening. 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