While these are usually budget-friendly options and could be considered good enough for some applications, these are generally not made strong enough to be considered for use on a rifle youd actually like to shoot often. Left handed shooting resources for the southpaws. Diamond fluted. A significant advantage of the upper, unlike a lower receiver, is it's not considered a firearm by the Bureau of Alcohol, Tobacco, and Firearms. Pistol Grip Lock Washer (Black Bag) Ambi Safety Selector,.. AR-15 Lower Parts Kit - Left Hand Includes: The UPUR-1LH is machined from Billet 7075 T6 Aluminum unlike the more commonly used 6061. PRO2A LEFT HAND 18" 6mm ARC 1/7.5 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 14.5" 5.56 NATO 1/7 Carbine Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 5" 5.56 NATO 1/5 Micro Length Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 18" 6mm ARC 1/7.5 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper Kit, PRO2A LEFT HAND 22" 5.56 NATO 1/7 Rifle Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 12.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 22" 6.5 Grendel 1/8 Rifle Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 18" 6.5 Grendel 1/8 Mid Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 9" 300 Blackout 1/7 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 22" 223 Wylde 1/7 Rifle Length Stainless Premium NR Side Charging M-LOK AR-15 Upper, PRO2A LEFT HAND 10.5" 350 Legend 1/16 Pistol Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 16" 6mm ARC 1/7.5 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 16" 5.56 NATO 1/7 Mid Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 18" 223 Wylde 1/7 Mid Length Stainless Premium M-LOK AR-15 Upper, PRO2A LEFT HAND 12.5" 5.56 NATO 1/7 Mid Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 22" 223 Wylde 1/7 Rifle Length NR Side Charging Stainless Premium M-LOK AR-15 Upper Kit, PRO2A LEFT HAND 6" 300 Blackout 1/7 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper - Suppressor Ready, PRO2A LEFT HAND 12.5" 300 Blackout 1/8 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 6" 300 Blackout 1/7 Pistol Length NR Side Charging Melonite AR-15 Upper with Flash Can Kit, PRO2A LEFT HAND 22" 223 Wylde 1/7 Rifle Length Stainless Premium M-LOK AR-15 Upper, PRO2A LEFT HAND 11.5" 5.56 NATO 1/7 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 13.7" 5.56 NATO 1/7 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 22" 224 Valkyrie 1/6.5 Rifle Length Melonite M-LOK AR-15 Upper Kit, PRO2A LEFT HAND 16" 6.5 Grendel 1/8 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 14.5" 5.56 NATO 1/7 Carbine Length Melonite M-LOK AR-15 Upper - Pinned & Welded, PRO2A LEFT HAND 14.5" 5.56 NATO 1/7 Carbine Length Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 18" 5.56 NATO 1/8 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper Kit, PRO2A LEFT HAND 18" 5.56 NATO 1/8 Mid Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 12.5" 5.56 NATO 1/7 Carbine Length Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 12.5" 6.5 Grendel 1/8 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 22" 5.56 NATO 1/7 Rifle Length NR Side Charging Melonite M-LOK AR-15 Upper Kit, PRO2A LEFT HAND 12.5" 6.5 Grendel 1/8 Carbine Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can, PRO2A LEFT HAND 18" 6.5 Grendel 1/8 Mid Length NR Side Charging Melonite M-LOK AR-15 Upper, PRO2A LEFT HAND 22" 224 Valkyrie 1/6.5 Rifle Length Melonite M-LOK AR-15 Upper.