XRK Singularity-13 attachment in MW4
The XRK Singularity-13 is a rear grip attachment (“Skeleton Grip”) that community sites list for one weapon: FiNN LMG. CODMunity lists a stat change on 1 of them; the largest is sprint to fire speed −7% on the FiNN LMG (better). It is in 1 popular build that CODMunity lists.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the XRK Singularity-13
Activision publishes no compatibility list; 2 community sources report this weapon. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| FiNN LMG | LMG | sprint to fire speed (small, better), ADS speed (small, better), ADS out speed (small, better), vertical recoil (small, worse), horizontal recoil (small, worse), vertical gun kick (small, worse), horizontal gun kick (small, worse), and flinch received (small, worse) |
What the XRK Singularity-13 changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| FiNN LMG | Sprint to fire speed | 237 ms | 220 ms | −7% (better) |
| ADS speed | 400 ms | 376 ms | −6% (better) | |
| Vertical recoil | 49.0 | 51.9 | +6% (worse) | |
| Horizontal recoil | 17.3 | 18.3 | +6% (worse) |
Smaller changes are left out of the table: 4 other stats on the FiNN LMG.
How it ranks among rear grip attachments
Its largest change on each weapon, compared with the other rear grip attachments the source lists that stat for.
- FiNN LMG: its small sprint to fire speed change (better) is the best of 2 rear grip attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the XRK Singularity-13
CODMunity lists 1 popular build that use it, all for Multiplayer. The styles are Versatile. The same builds also use optic, muzzle, stock, and laser attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| FiNN LMG | Multiplayer, Versatile | Very good | Optic: ZLR Type C, Muzzle: XRK Mil-Tac Suppressor, Stock: EXP Bulldog-9, and Laser: SZ Gen.6 PEQ | Open in the builder: FiNN LMG, Versatile |
Builds are community-reported and unverified.
Frequently asked questions
What does the XRK Singularity-13 do in MW4?
CODMunity lists 8 stat changes for it across 1 weapon: 3 better and 5 worse. The largest is sprint to fire speed −7% on the FiNN LMG (better).
Which weapons can use the XRK Singularity-13?
Community sites list FiNN LMG. Activision has not published a compatibility list.
Is the XRK Singularity-13 in a popular build?
Yes. CODMunity lists it in 1 popular build, on FiNN LMG.