--- title: "NcSTAR AR15 Upper Receiver Block" description: "Modular upper receiver block for AR15 maintenance. Use it for vise clamping, fuller receiver support, and bore cleaning with the built-in guide." canonical_url: "https://www.kygunco.com/product/ncstar-vtaruvb-vism-upper-receiver-block-for-ar15" meta: author: KYGUNCO "og:description": "Modular upper receiver block for AR15 maintenance. Use it for vise clamping, fuller receiver support, and bore cleaning with the built-in guide." "og:image": "https://cdn.kygunco.com/assets/products/152072/thumbnail.jpg?v=1713453998" "og:image:height": "500" "og:image:width": "500" "og:title": "NcSTAR AR15 Upper Receiver Block" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Gun Parts](https://www.kygunco.com/category/shooting/gun-parts) / [Handgun & Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts) / [Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts) / [Upper Receiver Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts/upper-receiver-parts) / NCS-VTARUVB ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/152072/main.jpg?v=1713453998) For illustration purposes only, this image may not be an exact representation of the product. # NCSTAR VISM Upper Receiver Block for AR15 Modular upper receiver block for AR15 maintenance. Can be used with the lower half alone to clamp the upper in a vise, or bolted together for fuller support during barrel installation or removal. The upper half inserts like a bolt carrier group, keeps the optics rail open, and includes a bore brush guide. Blue anodized aluminum construction. $36.89 ** 4 interest-free payments of **$9.22** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Fulfilled by a partner warehouse. ** Partner Fulfilled Selling fast. Limited quantities available. Item # 152072 Style NCS-VTARUVB UPC 848754010230 Condition New Manufacturer [NcSTAR](https://www.kygunco.com/brand/ncstar) Weight 1 lb ### [NcStar VISM Upper Receiver Block for AR15](https://www.ncstar.com/optics-acc/tools/ar15-tools/vtaruvb-upper-receiver-block-for-ar-15) - The modular upper receiver block can be used in several ways for many different maintenance tasks. You may use just the lower half of the block by attaching it quickly to the upper receiver with the two provided receiver pins. This allows you to clamp the AR upper receiver to a vise for maintenance work. - Bolting the two halves of the upper receiver block fully supports the upper receiver to prevent damage from torque twisting forces when installing or removing barrels from the receiver. - The upper half of the block inserts into the receiver just like a bolt carrier group. The bottom half of the block can be bolted together with the upper half with the provided steel bolts. This fully supports the inside and the bottom of the receiver and it also leaves the receiver optics rail open for mounting accessories and optics. Unlike other upper receiver blocks that bolt/clamp to the exterior of the AR receiver. - The upper receiver block also has a hole through the length of the block to act as a bore brush guide for cleaning out the bore of the barrel. - Constructed with blue anodized Aluminum. - U.S. Pat. D870840 ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## More from NcSTAR ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/ncstar-vtaruvb-vism-upper-receiver-block-for-ar15#webpage","@type":"WebPage","description":"Modular upper receiver block for AR15 maintenance. 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