for production qualification testing and operational testing over 24 months. H&K later confirmed that a modified G28 had indeed been selected as the CSASS rifle. The G28 is nearly 6 cm (2.5 in) shorter and 1.3 kg (3 lb) lighter than the M110 (unloaded and without a suppressor) and will cost about $12,000 per rifle. The U.S. Marine Corps was slated to begin receiving the CSASS in May 2018 to replace their M110 rifles. However, as of 2022, most of the M110A1 units delivered were configured as squad designated marksman rifles (SDMR) rather than M110A1 CSASS rifles. M110A2 The M110A2 is an improved version of the original M110 rifle with M-LOK rails, an improved gas system, new suppressor, and adjustable stock. This fills the gap of semi-automatic sniper rifles as most all of the M110A1 rifles issued were the SMDR variant and not designed for sniper work. The M110A2 was first seen at AUSA 2021 where it was displayed alongside a 14.5" SOCOM M110 rechambered for 6.5 Creedmoor. The M110A2 was later seen at the 2022 Best Ranger Competition being used by a Ranger-qualified 101st Airborne Division soldier. The M110A2 is shorter than the original M110 and lighter as well at , which is comparable to the M110A1 SDMR's weight of with no attachments save an unloaded magazine. The decreased overall length does not come at the cost of barrel length as the M110A2 still has a barrel. KAC had a 5 year $13 million contract in 2020 to supply the Army with M110 rifles and this was amended in 2022 to include the M110A2 version of the rifle. The Navy and Marine Corps, which had previously been interested in the M110A1 CSASS, decided to instead pursue an M110 SASS PIP (Product Improvement Program) for FY2021 based on findings indicating improved range and lethality with the PIP compared to the M110A1 CSASS. Funding for subsequent fiscal years has been devoted to this PIP. M110A3 (6.5mm Creedmoor conversion) The M110A3 is a 6.5mm Creedmoor conversion for SOCOM M110 rifles. In October 2019, NSWC Crane ordered KAC's self-termed M110K1 conversion kits to upgrade USSOCOM's M110s to fire 6.5mm Creedmoor, with and barreled configurations. These conversion kits included complete upper receiver assemblies chambered for 6.5 Creedmoor as well as new muzzle brakes, collapsible buttstocks, and precision adjustable buttstocks. New QD suppressors for 6.5 Creedmoor were to be ordered separately. Users : Used by