Developed in the 1960s and deployed in the 1970s, the Enfield L42A1 was an upgrade of the Number 4 Mark I (T) sniper rifle configured for use with 7.62x51 NATO ammunition, fitted with a high pressure bolt head and hammer forged target barrel. Additionally, Model 32 Mark III scopes were also upgraded to match the new caliber. About half of the approximately 900 rifles made were condemned and destroyed post-service by the Ministry of Defense. Blade front and ladder rear sights, the former properly lacking the fixed "battle sight" to accommodate the scope, with the receiver marked "L42A1D71.T", "M47/1944/G31227" on the socket, and "19T" on top of the extractor assembly and bolt handle. The scope body is finished in black, the original 32 MkIII markings lined out, "No 20377" left untouched, and "OS 2429 G.A./TEL.STRT.STG.L1A1/1240-99-963-2063" added, and the ring base marked "31227" to match the rifle. Smooth stock, with the forearm numbered to match the receiver, the wrist numbered to match the stock, a raised cheekpiece and a brass buttplate. Included with the rifle is a green painted hardwood transport case, an extra scope mount, a green steel scope case hand painted to match both the scope and the rifle, two slings, and a B.C. Limited & Company Regimental Scout Scope with leather case. The scope is marked "TELE. SCT.REGT. MKIIs/12326/O.S.126.G.A.", with a brass body and leather exterior. Traditionally carried by the "observer" (aka spotter) in a 2-man sniper team, the Scout Regiment scope provided a high power optic that was very useful for spotting enemy forces that were either camouflaged or concealed in deep foliage, which could potentially include enemy snipers.

Very fine as arsenal overhauled, with 95% of the matte arsenal black finish, showing mild wear and handling marks overall, The stock is good, with some mended cracks, restamped numbers, and mild wear and dents. Both sets of optics are crisp, with the scout scope showing both mild wear and a well aged patina, and the rifle scope showing mild handling marks and good adjustments. The accessories are in good order. Mechanically excellent.