Cross Machine Tool Ultra Precision AR-15 Upper Receiver - No Forward Assist
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Cross Machine Tool
Overview
The Cross Machine Tool Ultra Precision AR-15 Upper Receiver is a stripped, slick side receiver designed to provide a streamlined profile for your build. Its lack of a forward assist not only enhances the aesthetics but also reduces weight, making it an ideal choice for builders looking for a minimalist setup. This upper receiver is commonly used in carbine-length gas system setups, particularly for 5.56 NATO caliber rifles.
Specifications
Cross Machine Tool Ultra Precision AR-15 Upper Receiver - No Forward Assist
Available Merchants(1)
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Price Alert
September 2026 on GunPartPicker
Cross Machine Tool Ultra Precision AR-15 Upper Receiver - No Forward Assist ranked #267 of the 615 upper receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it ranks #284 of the 1,862 upper receivers builders have added. Builds with this upper receiver are split between 5.56 NATO (44%) and .223 Wylde (22%), split between carbine-length (57%) and mid-length (14%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today the one retailer we track has it in stock. Prices barely moved in September 2026, holding around $158, so there haven't been real sales lately. Buying today, the lowest price is $158 at Primary Arms, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
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Superlative Arms AR-15 Adjustable Gas Block .625" Clamp on Melonite
Midwest Industries Combat Handguard M-LOK Aluminum 11.5" Black
Griffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambidextrous Controls - Flared Magwell - Anodized Black - MK2AL
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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