{"product_id":"bcm-at-optic-riser-525","title":"BCM A\/T Optic Riser 0.525\" for AR-15","description":"\u003cp\u003eThe BCM A\/T Optic Riser is a 0.525\" Picatinny riser for AR-15 and M4 rifles, raising any 1913-mounted optic onto a longer, higher rail platform via BCM's angled-torque clamp.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOne rise, five footprints — the A\/T riser lifts the sightline 0.525\" and gives you the rail length to put the optic, the magnifier and the night vision exactly where they belong.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEvery one of the five versions rises by the same 0.525\" (13.3 mm). What changes between them is footprint: how many recoil slots the riser carries and how far it extends over or forward of the receiver. That rise puts a typical lower-third optic at roughly 2.16\" (55 mm) of optical centreline and an absolute-cowitness optic at roughly 1.93\" (49 mm) — a head-up posture that is easier to hold, easier to hold consistently, and easier to work under night vision or with eye protection and a helmet.\u003c\/p\u003e\u003cp\u003eThe A\/T in the name is Angled Torque: a patented clamp that applies triangulating force rather than pulling straight sideways, giving approximately twice the clamping force at the same torque as a legacy horizontal interface. Multiple integral recoil lugs engage the receiver rail so the riser cannot creep. The body is aircraft aluminium alloy, hard-coat anodised to Mil-A-8625F, with a nitride-coated steel clamp.\u003c\/p\u003e\u003cp\u003eOn a UK straight-pull AR-15 the case is straightforward. The rifle is worked by hand over the top of the receiver and shot deliberately from support, so a higher, longer optic platform means a more natural head position and room to lay out a red dot, a magnifier and a backup sight on one continuous plane instead of fighting for space on the receiver rail. The low-profile A\/T interface keeps the whole assembly snag-free and leaves the riser stalk usable for bolt-on or QD accessories along its length.\u003c\/p\u003e\u003ch3\u003eWhy shooters choose the A\/T Optic Riser\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.525\" (13.3 mm) rise on every version\u003c\/strong\u003e — a consistent, repeatable sightline whichever footprint you choose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAngled Torque clamp\u003c\/strong\u003e — approximately twice the clamping force at the same torque as a horizontal interface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple integral recoil lugs\u003c\/strong\u003e — the riser engages the rail and holds zero rather than creeping\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive footprints\u003c\/strong\u003e — from a 5-slot receiver-top riser to an 18-slot cantilever platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsable stalk\u003c\/strong\u003e — Mil-Std 1913 attachments mount anywhere along the riser, not just on top\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat the A\/T Optic Riser fits\u003c\/h3\u003e\u003cp\u003eFits any Mil-Std 1913 Picatinny receiver rail on an AR-15\/M4, including UK straight-pull AR-15 builds, and accepts any optic or mount with a 1913 clamp. Choose by footprint, not by height — all five rise by the same 0.525\". The 5-slot is a compact riser for a red dot alone; the 11-slot and 13-slot give room for a magnifier, night vision or thermal behind the optic, with the 13-slot covering the full length of the upper receiver. The 10X5 and 13X5 add a 5-slot cantilever section projecting forward of the main body for layering a magnifier ahead of the receiver — the X5 is a rail section, not a different height. Check the riser length against your handguard's top rail so the cantilever has somewhere to sit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003ctd\u003eAR-15 \/ M4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eAny Mil-Std 1913 Picatinny receiver rail; optics and mounts with a 1913 clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eOptic riser, 0.525\" (13.3 mm) rise, A\/T angled-torque clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAircraft aluminium alloy; steel alloy clamp, nitride coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eHard-coat anodised, Mil-A-8625F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd\u003e5-slot approx. 2⅛\" (54 mm) · 11-slot approx. 4.5\" (114 mm) · 13-slot approx. 5¾\" (146 mm) · 10-slot + 5-slot cantilever approx. 6⅛\" (156 mm) · 13-slot + 5-slot cantilever approx. 7¼\" (184 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMount interface\u003c\/th\u003e\n\u003ctd\u003eA\/T angled-torque clamp to Mil-Std 1913 Picatinny, with multiple integral recoil lugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eBravo Company USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMPN\u003c\/th\u003e\n\u003ctd\u003eBCM-OR-AT-525-5 · BCM-OR-AT-525-11 · BCM-OR-AT-525-13 · BCM-OR-AT-525-10X5 · BCM-OR-AT-525-13X5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eGet your head up and your optics in line. \u003cstrong\u003eOrder the A\/T Optic Riser today\u003c\/strong\u003e — in stock at Xtreme Tactical Gun Parts with free tracked UK delivery in 7–10 days.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eExplore more:\u003c\/strong\u003e \u003ca href=\"\/collections\/ar-15-parts-accessories\"\u003eAR-15 Parts \u0026amp; Accessories\u003c\/a\u003e, \u003ca href=\"\/collections\/iron-sights-backup-sights\"\u003eIron Sights \u0026amp; Backup Sights\u003c\/a\u003e or browse all \u003ca href=\"\/collections\/bravo-company-usa\"\u003eBravo Company USA\u003c\/a\u003e.\u003c\/p\u003e","brand":"Bravo Company USA","offers":[{"title":"5-slot","offer_id":42843550515280,"sku":"BCM-OR-AT-525-5","price":79.99,"currency_code":"GBP","in_stock":true},{"title":"11-slot","offer_id":42843550548048,"sku":"BCM-OR-AT-525-11","price":129.99,"currency_code":"GBP","in_stock":true},{"title":"13-slot","offer_id":42843550580816,"sku":"BCM-OR-AT-525-13","price":149.99,"currency_code":"GBP","in_stock":true},{"title":"10-slot + 5-slot cantilever","offer_id":42843550613584,"sku":"BCM-OR-AT-525-10X5","price":139.99,"currency_code":"GBP","in_stock":true},{"title":"13-slot + 5-slot cantilever","offer_id":42843550646352,"sku":"BCM-OR-AT-525-13X5","price":149.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/4978\/1328\/files\/bcm-at-optic-riser-525-5-slot.jpg?v=1786504629","url":"https:\/\/xtremetacticalgunparts.co.uk\/products\/bcm-at-optic-riser-525","provider":"Xtreme Tactical Gun Parts","version":"1.0","type":"link"}